635698 has 16 divisors (see below), whose sum is σ = 1154304. Its totient is φ = 256320.

The previous prime is 635689. The next prime is 635707. The reversal of 635698 is 896536.

635698 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (635689) and next prime (635707).

It is a super-2 number, since 2×635698² = 808223894408, which contains 22 as substring.

It is an unprimeable number.

635698 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1098 + ... + 1573.

It is an arithmetic number, because the mean of its divisors is an integer number (72144).

2⁶³⁵⁶⁹⁸ is an apocalyptic number.

635698 is a deficient number, since it is larger than the sum of its proper divisors (518606).

635698 is a wasteful number, since it uses less digits than its factorization.

635698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2697.

The product of its digits is 38880, while the sum is 37.

The square root of 635698 is about 797.3067163896. The cubic root of 635698 is about 85.9838621243.

The spelling of 635698 in words is "six hundred thirty-five thousand, six hundred ninety-eight".